Christian B - whose surname cannot be published due to German privacy laws - is suspected by German investigators of having abducted and killed then-three-year-old Madeleine McCann from her parent's holiday apartment in Portugal in 2007.

Christian B is currently on trial for a range of non-related sex offences committed in Portugal, including three rapes and two cases of exposing himself and masturbating in front of children.

Speaking at Braunschweig Regional Court on Tuesday, Romanian national Laurentiu Codin, 50, who shared a prison cell with Christian B in 2020, told a story which resembled the night when Madeleine disappeared.

"He told me that in Portugal, that he had stolen there... he was in a region of hotels where people are there, not sure how you say, rich people, where rich people live," he said.

"And when he was in the area of the hotels where the rich people live, there was somewhere an open window, he told me this, and this was the reason he asked me whether fingerprints could be left when he went out of the window.

"He said he went into the flat because of money and said that he didn't find any money, but found a kid, and took the child, and that two hours later, the place he was, it was then surrounded by police and dogs.

"And he then went away, out of the area, I am just saying what he told me... and he took the child in Portugal in his car, and in the time when the police and dogs were there at the house, he drove away, and he was gone, he asked me if the DNA from a child can be found as evidence and I answered yes."

In court, Codin also said Christian B had told him how he had used a van to have sex with young girls near Hanover.

The Romanian national said: "There was the talk of a girl... he said that he had a bus and that he had taken her with it, and the kids, he kept some of them, but not others, but he never said that he had killed them.

"He had sex with her... but he didn't kill her... He had her, and had done her business with her."

The judge then asked how old the girl was, to which he replied: "I don't want to say anything wrong, but she was very small.

"And I told him that it was out of order - what he had done. With small, I mean young, nine, 10, 13, I don't know."

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Codin went on to make several other claims, including that Christian B had sex with an elderly woman who he had hit and strangled, as this was his sexual preference.

He also said that Christian B had asked him whether a strand of hair was something that could be traced back to him and used as evidence, and that he had also said he needed a "large house" burning down.

Speaking outside of court, the defendant's lawyer Philipp Marquart refuted the testimony and said: "All of these claims are completely new. All of them. He has never said anything like this before, and they all contradict each other."

In court, Codin also claimed that Christian B had asked him how much it would cost to get a fraudulent passport so he could get back into Portugal, saying: "I can remember that he asked, that he needed a passport and also a driver's licence."

Presiding judge Ute Insa Engemann then asked: "And if I put it to you that in 2020, in your witness statement, there was talk about prices, a falsified one costs 1,500 euros and an original costing 2,500 euros, and he said he needed it for Portugal, to go to Portugal."

"Yes, yes I remember. Yes, he said that," Codin replied.

It has previously been reported that Codin is supposed to have heard that Christian B had boasted to him that he had committed rapes in Portugal and got away with it.

But in court, Codin refused to be drawn concerning the report, constantly repeating that he "did not want to incriminate" the defendant.

After being pushed on the matter, he said: "We had a few drinks and we walked but that is it" but refused to give any details.

He tried twice to say that he was not prepared to answer any questions. The judge reminded him he was under a legal obligation to do so.

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In court, Christian B also watched as a video clip was displayed on two large screens at Braunschweig Regional Court, showing the scenes of the apartment in Portugal where Madeleine disappeared in 2007.

The footage included interviews with Kate and Gerry McCann, as they described their horror on realizing that Madeleine was no longer in her bed on the night of 3 May 2007.

It also featured a clip from Aktenzeichen XY, the German equivalent of the UK's Crimewatch television show, where the German Federal Criminal Police (BKA) launched a public appeal for info on Christian B, showing photos of his house and the cars he drove.

The videos and photos were shown at the request of Christian B's lawyer, Dr Friedrich Fulscher, who argued it was important to understand that the witnesses may have been egged on by such media reports to misinterpret the defendant's behaviour as a sex offence.

The video was played straight after the court read out the testimony of the Portuguese girl who claimed that Christian B had been in a playground, pulled down his trousers and masturbated while calling out to her.

However, the prosecution objected to the video being shown in court and said that they could not see the relevance of it.

Codin's testimony against Christian B comes as there are indications the defendant could be acquitted.

The presiding judge, Uta Inse Engemann, who the prosecution has already tried to have removed on the basis that she is allegedly biased in favour of the defence, has already stated that there is no longer "sufficient suspicion of guilt for all of the charges".